# Algebra 2

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How many subsets of set T have 2 elemnts if set T has 5 elements?

• Algebra 2 -

The number of possible subsets with two elements is the number of combinations possible by choosing two elements out of 5
C(5,2) = 5!/(2!(5-2)!) = 5*4/2 = 10

http://en.wikipedia.org/wiki/Combination

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